[spook-l] Performance tips

[Vladimir Lasky]

Hi Everyone - here's some tips you may find useful:

If you have an MMX-enabled CPU (e.g. Pentium MMX, P2, P3, P4, some AMD
processors), make sure you have nasm or yasm installed on your system before
compiling xvidcore. This will ensure that xvidcore will utilise your CPU's MMX
instructions to accelerate MPEG4 encoding and your CPU usage will drop
dramatically. Remember to rebuild spook after you rebuild xvidcore.

Also just today, I discovered that there is an MMX-enabled version of libjpeg.
This would theoretically reduce CPU overhead in creating jpeg snapshots. For
people have configured spook to have a long delay between snapshots (e.g. 1
second or more), the difference probably wouldn't be too noticeable, but for
those have faster updates (e.g. multiple frames per second) or when spook has
support for proper MJPEG streaming (e.g. using HTTP mixed/replace headers like
camserv or palantir), it may be quite beneficial.

MMX JPEG (MMX-enabled version of libjpeg) can be downloaded from this page:

http://sourceforge.net/project/showfiles.php?group_id=5776

nasm is also required to build it.

Once you've built and installed libjpeg-mmx, edit spook's configure.ac and
configure files and replace "-ljpeg" with "-ljpeg-mmx" and then rebuild spook.

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